SILVA, V. G.; http://lattes.cnpq.br/9828766181938082; SILVA, Valdecléia Gomes da.
Résumé:
The meiofauna is consists organisms of microscopic organisms that are of great
importance to aquatic ecosystems, these organisms are still little known, especially
those that inhabit freshwater ecosystems. Phylum Nematoda is one of the main groups
of meiofauna, occupying the most diverse environments and reaching high densities.
The present study aimed at characterizing the structure of the meiofaunistic and
nematopununistic community in the limnic ecosystems of the Paraibano Oriental
Curimataú. A collection was carried out in each reservoir, the biosedimentological
samples were collected between December 2016 and May 2017, in three reservoirs
located in the cities of Cacimba de Dentro, Araruna and Tacima, in each reservoir were
marked four distinct points of sampling and. The collected samples were fixed with 4%
formalin and taken to the meiofauna laboratory of the UFCG/CES. These were washed
in running water using a 0.044 mm mesh intervals sieve. The Nematoda were pick out
on Dolffus plate, diaphanized and identified at the genus level. The meiofauna was
composed of two groups Nematoda and Turbellaria, with dominance of the Nematoda
group in all the reservoirs. The nematofauna was represented by 16 genera and, among
the prospected reservoirs, the greatest diversity of genera was recorded in Tacima. The
genera Monhystera and Mononchus were the only ones present in all the studied
reservoirs. The statistical analyzes fulfilled in this study showed that the structure of the
meiofaunistic and nematofaunistic community presented significant differences between
the reservoirs, and Tacima was the one that most differentiated, presenting only one
meiofaunistic group and the greater amount of genera.. The Nematoda group
demonstrated once again their supremacy in community studies of aquatic
environments.